Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.
Answer:Some individuals may be natural good at maths or may be just smart kids who are good with mathematics
Explanation:Some students may be intelligent or good at maths which means the shoe size will not be the cause of their quantification skills.
A confounding variable refers to another variable that you may have not take notice of but which is very likely to act on the variable you are trying to measure and make that change you are looking for , its an extra variable. It can mess up your experiment and give you result that are not caused by what your projected. They can assume a correlation that doesn't exist and insert bias in your study. For this reason you have to know these variable before you start your research or study in order to avoid them.
Pretending and using first-person pronouns such as I, me, mine, and myself are evidence that the child has developed: self recognition.
<h3>What is meant by self recognition?</h3>
This is the term that is used to refer to the fact that tghe child has become more aware of themselves and who they are.
Hence they would make use of pronouns that would refer to themselves and actions that label themselves.
Read more on self recognition here:
brainly.com/question/23790058
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The French and Dutch exploration were explorers who went into the "new world" and made colonies for their countries back home.
